No, I haven't purchased the tub yet...........On other sites I've read posts that alluded to the installer putting some kind of "insulation" on tub before install to improve heat retention quality (and also the noise factor), but they didn't say what product they used. I assumed it was a more common practice than it seems to be......But I will be setting the tub in a mortar base (I've heard too many stories of tubs that flex and creak when you get in it). I want to get this right the first time, even if it's overkill. :wink: